Steam-generator.



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No. 879,502. 'PATENTBD FEB. 18, 1908.

J. VAN OOSTERWYCK.

STEAM GENERATOR. APPLICATION FILED 'HAY 28. 1906.

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UNITED 'sTATEs PATENT oEEroE.

JEAN van o'osTEnunf'ci;, or CHNE'E, BELGIUM.,

STEEM-anNERATOE.

clare the following to be a full, clear, and ecact description of the invention, such as will enable others skilled in the art to which 1t appertains ,to make and use the same.

My present invention relates to steam generators consisting of individual compartments of which each is provided With sepa- -rated 'steam and water spaces, and in which compartments by means of a peculiar arrangement of groups of tubes an effective water circulation and therefore anintensive steam generation is obtained.

\ In, the accompanyin drawingsz-Figure 1 is a vertical sectiona view of the s team generator. Fig. 2 is a horizontal sectional viewtaken Aon the line A-Bof Fig. 1. Fig.

3 is a verticaltransverse sectional view of a modification of Vmy invention. l Fig. 4 is a sectional view taken on the line C--D of Fig. 3.

The superposed individual compartments of the steam generator are formed of the iront-Wall 1, rear-wall 2, side-walls 3 `and the horizontal partition-walls 4 arranged one above the other. The feed-water passes in a well known manner by means of over-How pipes 5 from an upper compartment to the next compartment below it.

To obtain'a water circulation in the in# dividual compartments groups of tubes 6 are employed, which are either made of one' piece and bent V-shaped'as shown in Fig. 1, or composed of two tubes joined in any suitable manner at the bend to obtain this V- shaped form. These .tubes 6 are attached in rows in such manner to the individual compartments, that their upper branches are put into communication withv thev steam spaces and their lower branches with the water spaces thereof. Under the mluence of the fire-gases steam bubbles are generated, which follow the slanting branches of the tubes 6 and thereby compel the water contained in the individual compartments to participate in their motion. The steam generated in the individual compartments steam-dome 8.

passes through the pipes 7 upwards to the To guide the fire-gases deflecting partition` walls 9, .consisting of {ire-proof material are Specification of Letters Patent. Appnmimneanw 28.1906. serial No. 318.999.

Patented Feb. 18, 1908;

arranged in zigzag form between the rows of `tubes, as indicated in Fig.` 1.

To prevent the steam generated in the lower tubebranches from rentering the water spaces, which may occur when a violent generation of steam takes place in the lower branches ofY said tubes before the water' circulation has set in, the lower compartment is provided with a division wall 1.0, whose holes `11 represent only a fraction of the cross-sectional area of the lower row of tube-Y branches next to the fire-grate A, so that these holes 1-1 ofler a suliicient resistance to prevent the steam from rentering the water space,.and thus compel it to follow its prescribed route.

Instead of arranging a division-wall 10 in the upper compartments where the generation of steam is naturally less rapid that in the bottom compartment, it suffices to arrange baHle-plates 12 of suitable cross-section in iront. of the lower tube branches.

Besides the holes 11 the division Wall 10 is provided with a number of small perforations 13, through which any steam-buh bles which may find their way back into the watenspace can escape to the steam-space of the lower compartment.

The aim of the modification of my invention, as illustrated in Figs. 3 and 4, is to obtain a steam generator with large Water i spaces, to whichend the individual conn partments are `enlarged until they surroundV lthe fire-grate A on'all sides and thus replace the otherwise necessary brick-work. For practical reasonsthe compartments of this modification are built up of sections or divisions united by comparatively large nipples 15 placed at such heights in the severa 4sections of the same compartmentas to permit an unrestricted circulation of water' and steam. This arrangement of the compartments simplifies the construction of the tubes I6 considerably, which here are replaced by the crosswise arranged straight tubes 14 communicating with their lower ends with the 'water space oa compartment-section lying at one slde oi' the lire-grate A and with their other ends with the steam space of a compartment-section lying opposite the. former, so that an energetic water circulation must take place from the right to the left and vice versa. y

The nipples 15 connect the several sections of one compartment with each other in such a manner, that the water entering one com-A 4through another over-How 'pipel to' the partment by one over-flow pipe 16 must pass through al its sections before it can iow next compartment lying -on a v I claimz-L- i f f l 1'.. A steam generator comprising a pli1,

. raiity--of superposed compartmentshaving i -.lsepara ted steam and water spaces; slanting tu es 4,communicatin with one end with the waterspaceand withv the other with thel j haine-plates arranged in front of the Vends of.

-said tubes communicating with thewater spaces'ol said compartments.

. partments but thevlowermost in front of the ends of the tubes communicating with the A steam generator comprising a pluirahty o-fsuperposed compartments having se tu es.communicating with their lower ends with the Water space and with theirvupper' ends with the steam space of said-compartments, baffle-plates arranged in all comwat'er s aces of said compartments to prevent steam om rentering said water spaces,

arated steam and water spaces,1slanting;`

and a eriforated divison wail in the water space o said lowermost compartment.

` 3. steam generator comprising -a plurality of superposed compartments arranged in sections around the lfire-grate and provided with separatedsteam and water spaces, slantends4 with the water s ace vofone section ofra compartment and wit their upper ends with the steam space of another section of the 'same compartment, ba'le plates arranged in all compartments but the lowermostin .frnt ofthe ends of the tubes communicating with the water spaces of said compi1 rtments,

anda division wall provided wit erforations for the passage of steam forme before A the water circulation of the steam generator.

.ing'tubes communicating with their lower I 

